共 29 条
- [21] WHY DO FIRMS DO BASIC RESEARCH WITH THEIR OWN MONEY [J]. RESEARCH POLICY, 1990, 19 (02) : 165 - 174
- [22] TRAJTENBERG M, 1992, 4146 NAT BUR EC RES
- [23] 2003, SSTI WEEKLY DIG 0516
- [24] 2003, ENG EC GROWTH EC IMP
- [25] 2004, SSTI WEEKLY DIG 0614
- [26] 2002, STATE SCI TECHNOLOGY
- [27] 2003, SSTI WEEKLY DIG 0627
- [28] 2000, SSTI WEEKLY DIG 0218
- [29] 1999, SSTI WEEKLY DIG 0820